Improvement in nut-blank machines



- UNITED STATES PATE1\TT OFFICE.

JOHN"P.'EDWARDS, WILLIAM N. B. EDMONSTON, AND WILLIAM,PORTER,

on (JLEVELAND, OHIO. y

IMPROVEMENT IN NUT-BLAK MACHINES.

Specification forming part of Letters Patent No. 173,921, dated February22, 1876 application filed i May 24, 1575.

To all whom t may concern:

Be it known that we, JOHN P. EDWARDS, WILLIAM N. B. EDMONSTON, andWILLIAM PORTER, of Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain new and useful Improvements in Nut- BlankMachines; and we do hereby declare the following to be a full, clear,andexact description of the invention, such as will enable othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which form part of thisspecification.-

Our invention relates to an improved machine for making nut-blanks; andconsists in rolling the same in a manner and by rolls constructedsubstantially as hereinafter set forth and claimed.

In the drawings, Figure 1 is a view, in elevation, of a machineembodying our inventon. Fig. 2 is a plan view of same; Fig. 3, avariation of same; Fig. 4, another variation. Fig. 5 represents a bar asit appears before it is rolled, and as it appears after it is rolled.

A is a suitable frame-work for supporting the two vertical rolls B. O isa horizontal roll. D is a suitable gearing, whereby the said verticalrolls B and horizontal rolls C are made to roll in close contact witheach other, as indicated by the arrows. B are notches formed in theunder. side of the vertical rolls B. These notches or recesses Bcorrespond to the sides of the nut-blanks that are to be formed. Theroll C is smooth, but rolls in i close contact with the under surfacesof the wheels B.

The operation of the device is as follows: A bar, E, Fig. 5,.is insertedbetween the vertical rolls B. The rolls C will maintain the said bar Einclose contact with the wheels B, and prevent the metal from spreadingdownward as it is acted upon by the rolls B.

The rolls B grasp the bar and draw it through,

forming iudentations in the said bar, permitting it to retain a smallthickness of metal between the nut-blanks, sufficient to hold themtogether. The action of the notches on the rolls B cause the bar E toemerge from the rolls in the shape shown at E, Fig. 5-that is, itretains the same thickness, but is elongated in the direction of itslength, and the different nut blauks can then be readily clipped ofl andfinished.

In rolling out the bar E in the machine shown in Fig. 1 trouble may beexperienced, owing to a fin forming either between the Smooth portionsof the rolls B or on the under surface of the said rolls B, above therolls O. In order to avoid the upper fin the rolls may, if desired, beformed as shown in Fig. 4.

In Fig. 4 the smooth portion of the rolls B is recessed in on theangular or die portion B and the notch or die portion B passes beneaththe smooth portion B of the other roll, which projects out beyond theangular or die portion.

By this mean-s it will be seen that the fin that might otherwise bcformed by the device shown in Fig. 4 is avoided.

So also the lower finthat is, the one that may form immediately over theroll Cmight at the same time be 'dispensed with by making rolls as shownin Fig. 3, the smooth portion'of one roll prevent-ing the lower fin,while the smooth portion of the other roll prevents the formation of theupper fin.

In the last-named case (shown in Fig. 3) the roll 0 is dispensed with,as it would be impossible for the bar E to come in contact with it.

lt is, however, deemed not necessary to employ the variations shown inFigs. 3 and 4, if particular care is taken in the adjustment of therolls B and C. (Shown in Fig. 1.) The rolls B are made removable, sothat other rolls for making different sizes of nuts may be inserted. So,also, the rolls themselves may be made slghtly adjustable, so that theycan be brought nearer to'or farther from each other and from the rollsC, as necessity may require.

We.are not aware that a machine for making nutblanks has ever beforebeen made,

1. In a machinefor making nut-blanks, the names t0 this specifieatiohinthe presence of combination of the two vertical die-rollers B, twosubscrihing wit'nesses.

substahtially as and for the purpose described. A

2. Thecombination of the vertical die-rolls Q B B and horizontal roll C,the whole f0rming a WILLIAM machine whereby the bar E is drawn into theform of a nutbar, E, substantially asand for: Witnesses:

the purpose described. H. T. HOWER,

.In testim0ny whereof we have signed our FRANCIS TOUMEY.

